Justice League Dark was announced on May 31, 2011 as a First Wave title of The New 52 The title and team was created by Peter Milligan, with art by Mikel Janín. The title launched on September 28, 2011. The title brought several of DC Comics’ occult and offbeat characters, something which had been a trait of sister imprint Vertigo, back into the main DC Universe following Vertigo’s editorial change to publish purely new, creator owned content.
In 1984, editor Len Wein assigned Swamp Thing to British writer Alan Moore. When Karen Berger took over as editor, she gave Moore free rein to revamp the title and the character as he saw fit. Moore reconfigured Swamp Thing’s origin to make him a true monster as opposed to a human transformed into a monster. In his first issue, he swept aside most of the supporting cast Pasko had introduced in his year-and-a-half run as writer, and brought the Sunderland Corporation to the forefront, as they hunted Swamp Thing and “killed” him in a hail of bullets. The subsequent investigation revealed that Swamp Thing was not Alec Holland’s consciousness transformed into a plant but actually a form of plant life that had absorbed Holland’s consciousness after exposure to his work, with Swamp Thing’s appearance being the plants’ attempt to duplicate Holland’s human form.
The 1986 company-wide crossover “Legends” concluded with the formation of a new Justice League. The new team was dubbed “Justice League” then “Justice League International” (JLI) and was given a mandate with less of an American focus. The new series, written by Keith Giffen and J. M. DeMatteis with art by Kevin Maguire (and later Adam Hughes), added quirky humor to the team’s stories. In this incarnation, the membership consisted partly of heroes from Earths that, prior to their merging in the Crisis on Infinite Earths, were separate. The Giffen/DeMatteis team worked on Justice League for five years and closed out their run with the “Breakdowns” storyline in 1991 and 1992. The series’ humorous tone and high level of characterization proved very popular.